Financial - risk management objectives and policies (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of financial risk management objectives and policies [Line Items]

Disclosure of foreign-currency exchange rates risk [Text Block]

A table showing the effect on results of a reasonable change in foreign-currency exchange rates is presented below, with all other variables kept constant:

	Exchange-rate increase/decrease			Effect on profit (loss) before income tax
				US$(000)
2018
Exchange rate		10	%		1,695
Exchange rate		(10	)%		(1,681	)

2017
Exchange rate		10	%		2,474
Exchange rate		(10	)%		(2,459	)

2016
Exchange rate		10	%		(924	)
Exchange rate		(10	)%		926

Disclosure of interest rates risk [Text Block]

A table showing the effect in profit or loss of the variations of interest rates:

	Increase/decrease of Libor rate		Effect on profit (loss) before income tax
	(percentage rates)		US$(000)
2018
Interest rate		10		(227	)
Interest rate		-10		227

2017
Interest rate		10		(677	)
Interest rate		-10		677

2016
Interest rate		10		(333	)
Interest rate		-10		333

Disclosure of financial liabilities by remaining maturity [Text Block]

An analysis of the Group’s financial liabilities classified according to their aging is presented below, based on undiscounted contractual payments:

	Less than		Between 1		Between 2		More than 5
	1 year		and 2 years		and 5 years		years		Total
	US$(000)		US$(000)		US$(000)		US$(000)		US$(000)

As of December 31, 2018 -
Bank loans		95,613		-		-		-		95,613
Trade and other payables		176,811		639		-		-		177,450
Financial obligation		77,183		374,760		201,487		-		653,430
Contingent consideration liability		-		-		5,904		32,472		38,376

Total		349,607		375,399		207,391		32,472		964,869

As of December 31, 2017 -
Bank loans		96,580		-		-		-		96,580
Trade and other payables		219,379		663		-		-		220,042
Derivative financial instruments		28,705		-		-		-		28,705
Financial obligation		110,062		148,718		449,689		-		708,469
Contingent consideration liability		-		-		9,280		28,469		37,749

Total		454,726		149,381		458,969		28,469		1,091,545

Minera Yanacocha SRL and subsidiary [Member]

Disclosure of financial risk management objectives and policies [Line Items]

Disclosure of detailed information about current financial liabilities [text block]

The following table represents the analysis of the Company's financial liabilities, considering the remaining period to reach such maturity as of the consolidated statement of financial position date (see note 11):

	2018		2017
	Less than 1 year		Less than 1 year
	US$(000)		US$(000)

Trade accounts payable		48,847		43,108
Accounts payable to related parties		10,846		9,962
Remuneration and similar benefits payable		22,907		27,419

		82,600		80,489